1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 2; RUN: opt -S -passes=jump-threading < %s | FileCheck %s 3 4@f = external global i32 5 6; Make sure the value of @f is reloaded prior to the final comparison. 7define i32 @test(i64 %idx, i32 %val) { 8; CHECK-LABEL: define i32 @test( 9; CHECK-SAME: i64 [[IDX:%.*]], i32 [[VAL:%.*]]) { 10; CHECK-NEXT: entry: 11; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[IDX]], 1 12; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[RETURN:%.*]] 13; CHECK: for.body: 14; CHECK-NEXT: [[F:%.*]] = load i32, ptr @f, align 4 15; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[F]], 0 16; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END_THREAD:%.*]], label [[COND_END:%.*]] 17; CHECK: cond.end: 18; CHECK-NEXT: [[CMP_I:%.*]] = icmp sgt i32 [[VAL]], 0 19; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[CMP_I]] 20; CHECK-NEXT: br i1 [[COND_FR]], label [[COND_END_THREAD]], label [[TMP0:%.*]] 21; CHECK: cond.end.thread: 22; CHECK-NEXT: br label [[TMP0]] 23; CHECK: 0: 24; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ 0, [[COND_END_THREAD]] ], [ [[VAL]], [[COND_END]] ] 25; CHECK-NEXT: [[F_IDX:%.*]] = getelementptr inbounds i32, ptr @f, i64 [[IDX]] 26; CHECK-NEXT: store i32 [[TMP1]], ptr [[F_IDX]], align 4 27; CHECK-NEXT: [[F_RELOAD:%.*]] = load i32, ptr @f, align 4 28; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i32 [[F_RELOAD]], 1 29; CHECK-NEXT: br i1 [[CMP3]], label [[RETURN2:%.*]], label [[RETURN]] 30; CHECK: return: 31; CHECK-NEXT: ret i32 0 32; CHECK: return2: 33; CHECK-NEXT: ret i32 1 34; 35entry: 36 %cmp = icmp slt i64 %idx, 1 37 br i1 %cmp, label %for.body, label %return 38 39for.body: 40 %f = load i32, ptr @f, align 4 41 %cmp1 = icmp eq i32 %f, 0 42 br i1 %cmp1, label %cond.end, label %cond.false 43 44cond.false: 45 br label %cond.end 46 47cond.end: 48 %phi = phi i32 [ %val, %cond.false ], [ 1, %for.body ] 49 %cmp.i = icmp sgt i32 %phi, 0 50 %sel = select i1 %cmp.i, i32 0, i32 %phi 51 %f.idx = getelementptr inbounds i32, ptr @f, i64 %idx 52 store i32 %sel, ptr %f.idx, align 4 53 %f.reload = load i32, ptr @f, align 4 54 %cmp3 = icmp slt i32 %f.reload, 1 55 br i1 %cmp3, label %return2, label %return 56 57return: 58 ret i32 0 59 60return2: 61 ret i32 1 62} 63